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Commit d6c842ad authored by Shubhrajyoti D's avatar Shubhrajyoti D Committed by Wolfram Sang
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i2c: omap: make reset a seperate function 



Implement reset as a separate function.
This will enable us to make sure that we don't do the
calculation again on every transfer.
Also at probe the reset is not added as the hwmod is doing that
for us.

Reviewed-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarShubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: default avatarWolfram Sang <w.sang@pengutronix.de>
parent 95dd3032

drivers/i2c/busses/i2c-omap.c

+24 −15
Original line number Diff line number Diff line
@@ -302,15 +302,9 @@ static void __omap_i2c_init(struct omap_i2c_dev *dev) 
		omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, dev->iestate);

}



static int omap_i2c_init(struct omap_i2c_dev *dev)

static int omap_i2c_reset(struct omap_i2c_dev *dev)

{

	u16 psc = 0, scll = 0, sclh = 0;

	u16 fsscll = 0, fssclh = 0, hsscll = 0, hssclh = 0;

	unsigned long fclk_rate = 12000000;

	unsigned long timeout;

	unsigned long internal_clk = 0;

	struct clk *fclk;



	if (dev->rev >= OMAP_I2C_OMAP1_REV_2) {

		/* Disable I2C controller before soft reset */

		omap_i2c_write_reg(dev, OMAP_I2C_CON_REG,
@@ -348,6 +342,20 @@ static int omap_i2c_init(struct omap_i2c_dev *dev) 


			omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG,

							dev->syscstate);

		}

	}

	return 0;

}



static int omap_i2c_init(struct omap_i2c_dev *dev)

{

	u16 psc = 0, scll = 0, sclh = 0;

	u16 fsscll = 0, fssclh = 0, hsscll = 0, hssclh = 0;

	unsigned long fclk_rate = 12000000;

	unsigned long internal_clk = 0;

	struct clk *fclk;



	if (dev->rev >= OMAP_I2C_REV_ON_3430_3530) {

		/*

		 * Enabling all wakup sources to stop I2C freezing on

		 * WFI instruction.
@@ -355,7 +363,6 @@ static int omap_i2c_init(struct omap_i2c_dev *dev) 
		 */

		dev->westate = OMAP_I2C_WE_ALL;

	}

	}



	if (dev->flags & OMAP_I2C_FLAG_ALWAYS_ARMXOR_CLK) {

		/*
@@ -599,7 +606,8 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap, 
						OMAP_I2C_TIMEOUT);

	if (timeout == 0) {

		dev_err(dev->dev, "controller timed out\n");

		omap_i2c_init(dev);

		omap_i2c_reset(dev);

		__omap_i2c_init(dev);

		return -ETIMEDOUT;

	}
@@ -609,7 +617,8 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap, 
	/* We have an error */

	if (dev->cmd_err & (OMAP_I2C_STAT_AL | OMAP_I2C_STAT_ROVR |

			    OMAP_I2C_STAT_XUDF)) {

		omap_i2c_init(dev);

		omap_i2c_reset(dev);

		__omap_i2c_init(dev);

		return -EIO;

	}